Nut-making machine



(Numdam Kamm-sheet 1, G. DUNHAM. NUT MAKING MACHINE-k Patented SeptQQ, SQOQ 'rus Nonms Patins cu.. van? (No Model.)

Y G. DUNHAM.

5 Sheets-Sheet 2.

Patented Sept. 9. 1890.

(No'Model.) I 5 Sheets-Sheet 3.

, e.DUNHAM. NUT MAKING MACHINE.

No. 436,172. Patented Sept. 9, 1890.

Sco

(No Model.) l 5 sheetssheet 4.

G. DUNI-IAM.

NUT MAKING MACHINE.

No. 436,172. Patented Sept. 9, 1890.

(No Model.) 5 Sheets-Sheet 5.

G. DUNI-IAM.

NUT MAKING MACHINE. No. 436,172. Patented Sept. 9, 1890.

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' UNITED STATES PATENT OEEICE.

GEORGE DUNl-IAM, OF UNIONVILLE, CONNECTICUT.

NUT-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 436,172, dated September 9, 1890.

Application filed October 14, 1889. Serial No. 326,975- (No model.)

To aZZ whom t may concern.-

Be it known that I, GEORGE DUNHAM, a citizen of the United States, residing at Unionville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Nut-Making Machines, of which the following is a specification.

My invention relates to improvements in nutfmaking machines; and the objects of my improvements are to improve the efficiency of the machine in many respects, and particularly to improve the construction of the blanking-out and central-h ole punching devices, the tiattener, the scrapfclearers, and to arrange the feed or transfer underneath the gages.

In the accompanying drawings, Figure 1 is a front elevation of my machine. Fig. 2 s a side elevation thereof. Fig. 3 is an enlarged horizontal section on line :1: of Fig 1. Fig. 4 is a like view of aportion of the same with some of the parts removed. Fig. 5 is a vertical section of a portion of my machine on line y y of Fig.' 3. Fig. 6 is a vertical section of the central-hole, blanking-out, and crowning dies on line .a e of Fig. 3,together with a side elevation of the punches belonging to said dies. Fig. 7 is a vertical section through the trimming-die on line w w of Fig 3. Fig. 8 is a side elevation still further enlarged, showing one'end of the blanking-die holder and the gages attached thereto. Fig. 9 is a vertical section corresponding with Fig. 5, but showing a modification in the flattener and gages. Fig. 10 is a side elevation showing the modified form of said attener. Fig. 11 is a partial horizontal section and partial plan view of detached parts, showing, ou a larger scale, the spring-pressed gages through which the bar is fed to the blanking-die; and Fig. 12 is a vertical section of detached parts on the line w w vof Fig. 3 on a larger scaley than that for Fig. 7.

A designates the frame of the machine, which is similar to that of a power-press, and at the upper end of which is thecrank-shaft B for driving the punch-slide C 1n the usual manner of such machines. Said crank-shaft also carries the cams D D and E for driving, respectively, the slides 11 11 and 12. The cams D D and slides 11 11 act upon the roller 13 for reciprocating the carriageF in the manner shown and described in my patent of January 24, 1888, No. 376,769, for a mechanical movement. This carriage F is provided with a finger-slide G, which moves from front to rear in addition to-its lateral movement with the carrier F. The inner end of this slide is provided with a carrying-finger 14 and a scrapclearer 15, Fig. 4. This finger-slide is actuated by means of the grooved cam E 'on the crank-shaft B, the vertically-moving slide 12 connected therewith, rocking arm' 16 on the rock-shaft 17, one end being secured to the slide 12, and the second rocking arm 18 at the front of the machine, which projects upwardly from said rock-shaft 17 to apin 19 on the front end of the iinger-slide G, said rocking arm being slotted vertically at a point where said pin passes through it. This finger-slide and the means for operating it are substantially the same as corresponding parts of the machine for finishing nuts shown and described in my application, Serial No., 304,694, filed March 25, 1889, and of themselves form no part of the present invention. This mechanism imparts to the finger-slide what is often termed a four-motion movement. other features shown and described in said application are wholly or partially shown in the adrawings, and may be embodied in the machine of the present application, but of course are not of the present invention, excepting as they may enter into new combinations.

The punch-slide O is provided with a central-hole punch 20, Fig. 6, the blanking-out punch 21, the flattening-punch or hammer Some of the 22, andthe trimming-punch 23. The ce'ntral- U hole punch 2O is inthe rear of the blanki'ngl out punch 21, while the punches 22vand 23 are at one side of said blanking-out punch in a line at right angles to aline running through the center of the punches 2O and 21.

H designates the die-bed, to which the several dies and gagesy aresecured.

24 designates adie-holder for the crowningdie 25, which holder is secured to the die-bed.

26 designates the die-holder for the Hattening die or anvil 27 and the trimming-die 28. On the top of the crowning-die holder 24 is another die-holder 29, bearing the central-hole die 30, and still another holder 34, bearing the blanking-out die 35 and iiattener 36, the position of the several dies corresponding 'with IOO the several punches before described, while the crowning-die is immediately under the blanking-out punch and die. The rod or bar is fed in between the spring-pressed gages 3l 31 and under the take-off or picker 32. Said spring-gages are in substance substantially the same as patented to me in my patent of October 30, 1888, No. 391,951, for a nut-m aking machine.

The under side of the take-olf or cap 32 is recessed from front to rear through its middle portion to make room for the spring-pressed gages 3l and the space between them through which to feed the bar. These gages 31 are pivoted to the top of the die-holder 29, as shown in Fig. 11, in which figure designates their pivot-pin. The rear ends of said gages 31 are provided with upwardly-projecting lugs 61, through which lugs the bodies of the screws 62 pass. At the rear edge of the take-off there is a bracket 63, into which the threaded ends of these screws enter. A spring 64 is secured by a setscrew 65 to said bracket 63, the endsof which spring bear upon the upwardly-projecting lugs 61 of the gages 31 with a constant tendency to throw apart the rear ends of said gages, thereby pressing their front ends toward each other. The screws 62 may be turned out or in to limit the extent of inward movement of the front ends of said gages. That side of the blanking-out punch 21 which faces the central-hole punch 2O is recessed or cut away, as at 33, Fig. 6, and the centralhole punch 20 is shorter than the blankingpunch, so that its end is in the same plane as said cut-away portion. This blankingpunch may be formed solid in one piece or its lower end may be a separate piece dovetailed in, as shown in Fig. 6. At the front of the blanking-out die 35 there is astop or gage 47. The flatt-ener 36 is a loose block which plays slightly up and down in the blanking-die holder 34, the same being forced downward to flatten the blank by means of the {latten-l` ing punch or hammer 22. A lateral passage is left for the nuts through the machine underneath the blanking-out die 35, flattener 36, and above the crowning-die 25, flatteningdie 27, and trimming-die 28. On the front and rear sides of this passage-way through the blanking-out-dieholderI arrange two springgages 37 37, the same being secured to said holder 34 by means of screws 38, Fig. 8, that pass through slot-s in the shank of said gages, whereby the same may be adjusted to or from the front of the machine.

While I prefer to employ two yielding gages 37, if desired, a fixed gage might be substituted for one of said yielding gages. These gages extend from the crowning and blanking-out dies to a point near the flattening-die, as shown. I also employ a rear gage 39 and a front gage40 for gaging the opposite edges of the nut, which gages in the preferred form extend from a point near the crowning-die along `by the sides of the fiattening and trimming dies, and I prefer to mount these gages upon yielding slides 4l 4l, substantially such as are shown and described in my aforesaid application, Serial No. 304,694. The manner of applying the spring to these slides is shown in Fig. 12, in which the slide 41 is shown as provided with a downwardly-extending lug 66, through which a set-screw 67 passes with its end resting against the block or piece 70, over which said slide moves. Another screw 68 passes loosely through said lug 66, and its threaded end is screwed into said block or piece 70 or other stationary part, and a spiral spring 69 is placed on said screw with one end bearing on the screw-head and its other end on said lug, whereby said spring always has a tendency to press the slide forward until it is stopped by thev end of the set-screw. By turning said set-screw 67 the limit of the forward movement of the slide maybe adj usted as desired. I also provide a slidingside gage 42 and a latch-gage 43 in the vicinity of the trimming-die for stopping and holding the vnut in the manner hereinafter described.

The body of the latch-gage is so thin as to constitute a spring, and it is in the form of an angle-lever, as shown in Fig. 3, so as to be out of the way of the trimming-punch. The under side of its shorter arm is beveled, as shown in Fig. 5. The side gage 42 should slide longitudinally and be forced toward thelatchgage by a suitable spring, as, for instance the spring 48, Fig. 3. The front and rear gages are preferably made light and thin and set a little distance above the respective dies. In any event the front gage is left above said dies a distance suiiicient to allow room for the carrying-linger 14 and scrap-finger 15 to pass in under said gage. The carriage F is provided with a rearwardly-projecting arm, which carries the pushing-finger 44, which finger Vis in the line of the transverse passage-way through the blanking-out-die holder 34. WVithin the crowning-die is the ordinary knockout 49, that is forced upwardly by the lever 50, intermediate said knockout and the lower end of the vertical slide 12.

Instead of making the front andrear gages extend along by the front and rear sides of the flattening-die 27, the ilattener 36 may be provided with front and rear side ledges 45, as shown in Figs. 9 and 10, to take the place of a portion of said front and rear gages, which are made correspondingly shorter. The flattener is provided with a steady pin or spline 46 to prevent it from rotating within the holder, in which it is mounted. The corner at the under side of the ilattener which is `nearest the crowning-die is beveled oli a little, so that the iiattener may be pushed upward when a nut is forced under it.

In the construction shown in Figs. 9 and 10 the iattener is held up by the peripheral shoulder, and in the construction first described it may rest upon the front and rear gages, which will act as springs to hold it up when not depressed by the flattening-punch.

A bar of metal of the proper width is fed IOC IIO

' the blanking-die 35, which cuts off a proper length for a' nut-blank. After one piece or nut-blank has been cut fromthe end of the bar by the blanking-out punch and die the end of the bar is stopped against the stop- `"gage 47, and a hole in the bar is punched and ahnt-blank cut off at each stroke of the press. The punch 2l by the continued motion of the punch-slide also forces the nut-blank down between the gages 37 37 and upon the crowning-die to crown or round one face of the nut. Said gages hold the blank in proper position as it passes to the crowning-die, and also hold it after it .has been crowned' to prevent it from following the punchon its return. The punching ofthe central hole is done substantially simultaneous with the crowning of the nut, and the blanking-out or shearing operation takes place a little prior in the movement of the press-slide to the act of punching the central hole. In punching said hole the bar is inclined to lengthen somewhat, and by making the cut-away portion 33 in the blankingpunch immediately opposite the end of the central-hole punch I avoid crowding of the metal between ,the punches 2O and 21 in punching the central hole. When the pun ch 21 rises again, the punch 2O is withdrawn from the bar, so that the bar readily yields and gets out of theway of the larger lower end of the punch without creating any undue friction. lWhen these operations of punching the central hole, blanking out.-

and crowning the'nnt are performed, the carriage F is at the right-hand end of its stroke and the finger-slide G is drawn toward the front away from the dies 27 and.

. 28. After said punching operations the cam E on the crank-shaft B moves the slide 12 downward and raises the knockout 49 to loosen the nut from the crowning-die. The mechanism intermediate said slide 12 and finger-slide G operates to throw said slide forward. The carriage F then moves to the left, when the pushing-finger 44 engages the nut lying between the gages 37 37 and carries said nut from the crowning-die 25 to its position over the flattening-die 27, and when the carriage is at its left-hand end of its stroke the finger-slide G is withdrawn by moving ceiving any pressure from the flatteningpunch. Upon the ascent of the punch-slide the carrier and finger-slide move as before described. when the carrying-finger 14 is brought into position by the right-hand side of the nut on the attening-die 27, and as the carriage moves to the left the nut is carried to the trimming-die 28. The carriage may move far enough to carry the nut a little beyond its proper position over the trimming-die, the sliding side gage 42 yielding to permit the nut t9 pass thus far. gage said gage springs upwardly and lets the nut pass and then springs downwardly again In passing the latchinto position. Upon the withdrawal' ofthe finger-slide the sliding side gage presses the nut back against the latch-gage to hold the nut by two sides, while the front and rear gages hold it by the other two sides. The punchslide and punch 23 then descend and force the nut into the trimming-die to trim it, from which die it may fall through a proper opening to any suitable receptacle. At the next repetition of the same movement-s the scrapclearer 15 on the linger-slide G, in advance of the finger 14, will brush or push away all of the scrap from the trimming-die to make it ready for the succeeding nut.

I have specifically followed only one nut through the machine; but after the machine is started all of the several operationsl described will be performed at theirrespective places at every reciprocation of the pressslide.

IOO

By having the carrying-finger work u'nder IOS IIO

tion of holders, or, in other words,they gage by holding the nut.

I claim as my invention" 1. The combination of a central-hole punch and die and a blanking-out or shear punch and die, the blanking-out or shear punch having the cut-away or reduced portion above its tral-hole punch, substantially as described, and for the purpose specified.

2. A blanking-out or shear die holderhaving a lateral' passage-way under the die, in combination with a yielding gage or holder within said passage for acting on the edge of the nut-blank, and a pushing-linger to force said nut-blank along, substantially as described, and for the purpose specied.

3. The combination of a blanking-out or shear die holder having a lateral passage-way for the nut-blank, the blanking out punch and die, the crowning-die under said. blankingout die within said passage-way, a yielding -cutting end on that side which faces the cenv gage or holder also within said passage-way and between the blanking-out and crowningdies, and a pushing-finger to force the nntblank along, substantially as described, and for the purpose specified.

4. The combination of the tlattener-die, the I'lattener-punch, and a separate flattener intermediate said die and punch, substantially as described, and for the purpose specified.

5. The combination of the fiattener-die, fiattener-punch, front and rear gages by the sides of said iiattener-die, and the flattener interposed between said iattener die and punch and Acovering the space between said gages, substantially as described, and for the pur- Vpose speciied.

6. The blanking-out or shear die holder and the flattener 36 mounted therein over a bed, substantially as described, and for the purpose specified.

7. The blanking-out or shear die holder having the lateral passage-way for the nuts, the attener 36, mounted in said holder over said passageway, and gages for the front and rear sides of said passage-way, substantially as described, and for the purpose specified.

8. The combination of the iiattener die and punch, the iiattener, front and rear gages, and the trimming die and punch, substantially as described, and for the purpose specified.

9. The combination of the crowning die and punch, the lattener die and punch, the flattener, and the trimming die and punch, substantially as described, and for the purpose specified.

10. The combination of the crowning die and punch, the iiattener die and punch, the flattener, the trimming die and punch, and gages, substantially as described, and for the purpose specified.

1l. The combination ot the blanking-out die and punch, the crowning-die, the flattener die and punch, the iiattener, and a trimming die and punch, substantially as described, and for the purpose specified.

l2. The combination ot' a blanking die and punch, acroWning-die, flattening devices, and a trimming die and punch arranged for successively blanking, crowning, flattening, and trimming a nut-blank in the order named,

substantially as described, and for the purpose speciied. i

13. The combination of a trimming die and punch, front and rear gages, and gages at the right and left, substantially as described, and for the purpose specified.

14. The combination of a carrier, rear and front gages 39 and 40, the sliding gage 42, and latch-gage 43, said gages acting to hold a nut on four sides, substantially as described, and for the purpose specified.

15. The combination of dies and punches for operating upon a nut-blank, the elevated front gage, and a carrier-fingerWorking under said front gage and over said dies, substantiallyas described, and for the purpose specified.

16. The combination of a carrier, mechan ism for operating said carrier with a fourmotion movement, and a scrap-clearermounted on said carrier to move in advance of the nut, substantially as described, and for the purpose specified.

17. In a nut-machine, the finger-slide hav-` ing the carrying-finger 14:, and rigidly connected therewith the scrap-clearer 15 with a space between them for the nut, substantially as described, and for the purpose specified.

18. The combination of the crowning die and punch, iiattening devices, the trimming die and punch, the reciprocating carriage F, the pushing-finger 44: on said carriage, the finger-slide moving with said carriage and also at right angles to its movement, and the carrier-finger and scrap-clearer mounted on said finger-slide, substantially as described, and for the purpose specified.l

19. The combination ofthe iiattener die and punch, the iattener held over said die, a front gage also elevated above said die, and a carrier-Iinger Working underneath said front gage and tlattener, substantially as described, and for the purpose specified. i

GEORGE DUN HAM. lVitnesses:

GEORGE E. TAFT, CHARLES E. HART. 

